{"id":"CVE-2025-12748","title":"A flaw was discovered in libvirt in the XML file processing","summary":"A flaw was discovered in libvirt in the XML file processing. More specifically, the parsing of user provided XML files was performed before the ACL checks. A malicious user with limited permissions could exploit this flaw by submitting a…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"published":"2025-11-11","updated":"2026-06-25","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-12748","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:18326","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:18748","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2025-12748","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2413801","label":"secalert@redhat.com"}],"tags":["nvd","exploit-available"],"epss":0.00208,"epssPercentile":0.11297,"ingestedAt":"2026-06-29T13:24:34.596Z","exploits":{"github":1,"githubRepos":["https://github.com/TERESH1/CVE-2025-12748"],"checkedAt":"2026-09-24T07:52:52.885Z"},"exploitAvailable":true,"slug":"CVE-2025-12748","body":"## Overview\n\nA flaw was discovered in libvirt in the XML file processing. More specifically, the parsing of user provided XML files was performed before the ACL checks. A malicious user with limited permissions could exploit this flaw by submitting a specially crafted XML file, causing libvirt to allocate too much memory on the host. The excessive memory consumption could lead to a libvirt process crash on the host, resulting in a denial-of-service condition.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":4785,"id":"CVE-2025-12748","ts":1788887205981,"field":"exploit_available","old":"false","new":"true"},{"seq":3668,"id":"CVE-2025-12748","ts":1788886322768,"field":"exploit_available","old":"true","new":"false"},{"seq":2519,"id":"CVE-2025-12748","ts":1788882990435,"field":"exploit_available","old":"false","new":"true"},{"seq":1548,"id":"CVE-2025-12748","ts":1788882404219,"field":"exploit_available","old":"true","new":"false"},{"seq":662,"id":"CVE-2025-12748","ts":1788881841755,"field":"exploit_available","old":"false","new":"true"}]}